[ubuntu] Can't connect or sync

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http://ubuntuforums.org – I'm running 10.04 My computer used to be registered with Ubuntu One (the free service). Now it's no longer registered with Ubuntu One because I deleted my machine from the list of my computers that uses it. There is NO Ubuntu one listed in the Accessories------>Passwords and Encryption keys. When trying to connect to U1 (keep in mind the computer I want to add to U1 isn't listed in the U1 Preferences and I can't add it. Any idea how to fix this? (Hardware)